Another day, another pair of tiny shorts! Amanda Seyfried dons Daisy Dukes as she and Justin Long work up a sweat on a run with her dog

Amanda Seyfried donned a pair of black Nike micro-shorts as she and boyfriend Justin Long went on a run with her dog, Finn, in the Los Feliz neighbourhood of Los Angeles on Friday.

The couple worked up quite a sweat in the hilly area although the pooch, wearing a cute neckerchief, took it in his stride.

Look at those legs: Amanda Seyfried showed off her shapely pins as she and boyfriend Justin Long walked her dog Finn in the Los Feliz neighbourhood of Los Angeles on Friday morning

The 28-year-old actress teamed her Daisy Dukes with a yellow long-sleeved T-shirt with Hampton Tennis Club 1966 and two crossed racquets on the front. She wore that over a grey T-shirt.

The blonde wore her beautiful hair side-parted and pulled back into a low ponytail.

Amanda didn't bother with any make-up for her early morning exercise session.

Getting hot: The 28-year-old kept cool in Nike micro-shorts while her 35-year-old beau obviously should have opted for lighter clothing as he worked up quite a sweat

Her boyfriend of eight-months, Dodgeball actor Justin, aged 35, wore a grey T-shirt with black edging that showed a very visible damp patch around the neck, paired with black sweats and trainers. He popped a black cap on his dark hair.

Both stars carried small water bottles to make sure they stayed hydrated.

Amanda turned heads on Tuesday as she and Justin picked up groceries from Whole Foods in LA.

Falling behind: The Big Love star lagged a bit as she and Finn followed Justin up a hill

The star wore a pair of tiny checked shorts on the summery day when temperatures hit the high 80s Fahrenheit.

Amanda has recently been working in Pittsburgh on her next film, Fathers And Daughters, alongside Russell Crowe and Breaking Bad's Aaron Paul as her romantic interest.

The pair also co-starred as lovers in HBO drama series Big Love, which follows a family of fundamentalist Mormons in Utah.

It's a dog's life: While his mistress may have been getting a bit tired, Finn looked more than up for the walk

The Mean Girls actress told ET Canada: ‘We played lovers for a bunch of years on and off, so he feels like an ex-boyfriend.’

She also told the website that she would love to see a Mean Girls reunion, saying: 'I can't imagine it working out but it would be nice. I mean I'd love to do that but I know everybody is kinda busy.'

Meanwhile, the Le Miserables star was
announced as Givenchy’s new muse last month, something she told Glow
magazine's May edition she thought was unimaginable.

On a shopping spree: Amanda stepped out in fetching black and white checked shorts as she and Justin stocked up on groceries in LA on Tuesday

Meanwhile, the Le Miserables star was
announced as Givenchy’s new muse last month, something she told Glow
magazine's May edition she thought was unimaginable.

'It’s
not something I would ever have imagined could happen to me… I never
saw myself as somebody who could represent something so chic.'

She
can next be seen in the comedy western, A Million Ways To Die In The
West, alongside Charlize Theron, Liam Neeson and Neil Patrick Harris,
which is set to be released on May 30.

Sense of fun: The blonde carried a Halloween-print shopping bag which was out of keeping with the season

Justin has also been busy and has a number of projects on the go.

He has finished work on Undiscovered Gyrl, co-starring Britt Robertson as a teenager who takes a year off before college to find herself; and The
Lookalike, about two criminals who scramble
to find a woman who looks like a drug lord's love interest after she unexpectedly dies.

In
post-production are Comet, set in a parallel universe, and Tusk, about a
man hunting for his missing friends in the backwoods of Canada.